package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对

         password = DigestUtils.md5DigestAsHex(password.getBytes());//对前端传过来的明文密码进行md5加密处理

        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /*新增员工
     * @param employeeDto
     * */
    @Override
    public void save(EmployeeDTO employeeDTO) {//在实现时应该将dto转换成实体类
        //System.out.println("当前线程的id"+Thread.currentThread().getId());//获取当前线程id
        Employee employee=new Employee();
        //对象属性拷贝
        BeanUtils.copyProperties(employeeDTO,employee);//BeanUtils.copyProperties拷贝属性,属性名应该一致

        //设置空缺的位置，设置账号状态,1正常，0锁定
        employee.setStatus(StatusConstant.ENABLE);//定义一个常量类

        //设置空缺的位置，设置密码,默认123456,引用PasswordConstant
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));//使用md5加密，并且使用getBytes获取数组才能加密

        //设置当前记录的创建和修改时间
        //employee.setCreateTime(LocalDateTime.now());//LocalDateTime.now()机器当前时间
        //employee.setUpdateTime(LocalDateTime.now());

        //设置当前记录创建人id和修改人id

        //employee.setCreateUser(BaseContext.getCurrentId());//获取拦截器存入的id
        //employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.insert(employee);
    }

    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        //开始分页查询
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());//使用pageHelper插件，调用startpage进行拼接，第一个空页码，第二个空页面大小

        Page<Employee> page=employeeMapper.pageQuery(employeePageQueryDTO);

        long total = page.getTotal();
        List<Employee> records = page.getResult();



        return new PageResult(total,records);//将获取的total和records封装到pageresult
    }

    /**
     * 启用禁用员工账号
     * @param status
     * @param id
     */
    @Override
    public void startOrstop(Integer status, long id) {
        //update employee set status?=where id=?
        //构建实体直接调用update
        Employee employee=new Employee();
        employee.setStatus(status);
        employee.setId(id);
        //Employee employee = employee.builder().status(status).id(id).build();方法2：使用builder来构建
        employeeMapper.update(employee);

    }

    /**
     * 根据id来查询员工
     * @param id
     * @return
     */
    @Override
    public Employee getById(Long id) {
        Employee employee=employeeMapper.getById(id);
        employee.setPassword("****");//加密前端显示的密码
        return employee;
    }

    @Override
    public void update(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);//通过对象的拷贝来转换对象

        //LocalDateTime.now()机器当前时间
        //employee.setUpdateTime(LocalDateTime.now());

        //设置当前记录修改人id

        //获取拦截器存入的id
        //employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.update(employee);
    }

}
